Employee illegally discharged for disputing his Salary

I am an employee of a BPO company here in Tarlac. I was transferred to a different line of business after being on bench for two months because I have suffered from sore eyes during the training period of my first account. The bench period was only supposed to be for 15 days and been extended up to two months without notice. Now that I started with my new account with new bosses pirated from a different company who did not know much yet about the process of disputes here, I have suffered from multiple salary disputes from my previous account to present, and raised it with them, but didn’t get any. Most of my colleagues have their disputes running for months as well. I was promised and my disputes were approved to be credited on a specific date but still did not get any. So I raised the concern again and I was embarrassed how they asked me how much am I disputing. I told them that I will file for complaint with nlrc if I didnt get any resolution for my issues. Then I still didn’t get any, so since most of my colleagues have the same issue, I ask who will join me to nlrc through chat at home, then when they found out in the office, they took a screen shot and when I came back for work after 1 day of being absent due to hypertension,they immediately asked me to log out, pulled me out from the production area and told me to never talk to anyone and sent me home without having me sign anything by the orders of the account manager. I only asked who will join me, it was a private chat from facebook. I felt it’s wrong for them to do that.